Ikata Nuclear Power Plant
| Ikata Nuclear Power Plant | |
|---|---|
The Ikata NPP, August 2006
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 Location of Ikata Nuclear Power Plant in Japan
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| Country | Japan |
| Coordinates | 33°29′27″N 132°18′41″E / 33.49083°N 132.31139°ECoordinates: 33°29′27″N 132°18′41″E / 33.49083°N 132.31139°E |
| Construction began | September 1, 1973 |
| Commission date | September 30, 1977 |
| Operator(s) | Shikoku Electric Power Company |
| Nuclear power station | |
| Reactor type | PWR |
| Cooling source | Iyo-nada Sea |
| Cooling towers | no |
| Power generation | |
| Units operational | 1 x 566 MW 1 x 890 MW |
| Units decommissioned | 1 x 566 MW |
| Nameplate capacity | 1,456 MW |
| Capacity factor | 84.7% |
| Average generation | 10,800 GW·h |
The Ikata Nuclear Power Plant (伊方発電所 Ikata hatsudensho?, Ikata NPP) is a nuclear power plant in the town of Ikata in the Nishiuwa District of Ehime Prefecture, Japan. It is the only nuclear plant on the island of Shikoku. It is owned and operated by the Shikoku Electric Power Company. The plant was shutdown along with all other nuclear plants in Japan following the Fukushima Daiichi nuclear disaster. Unit 3 was reactivated using plutonium-uranium mixed oxide fuel on 12 August 2016 and began providing electricity to the grid three days later.
The plant is on a site with an area of 860,000 m2 (212 acres); 47% of the site is "green", by comparison the non-nuclear plants Shikoku Electric operates are 13.8, 20.1, 21.2 and 45.5%.
On March 3, 2004 there was a coolant leak in Unit 3.
On August 13, 2003 the maximum burnup for spent fuel was changed from 48,000 MWd/ton to 55,000 MWd/ton.
In January 2006 Mitsubishi Heavy Industries announced the completion of the replacement of the internal structure of the No.1 reactor. It was the world's first all-in-one extraction and replacement of the core internals of a PWR reactor. The upper and lower internals of the reactor were replaced in order to accommodate more control rods and allow for higher fuel burnup.
In 2010, a partial MOX fuel core was loaded into the No.3 reactor for the cycle beginning February 24, 2010.
On Sunday 4 September reactor no. 1 was shut down for regular inspections. These check-ups would last at least three months. At that time reactor No.3 was also shut down, although the normal inspections were long time finished before September. To resume operation, a stress test was required for all suspended reactors by the government, after the accidents in Fukushima. The Ehime prefectural government said it would decide whether to approve the resumption of operations after the results of the safety test came out. The Shikoku Electric Power Company said that if the No. 3 reactor did not resume operations, power supplies would be very tight in winter when electricity demand would be high. It was considered to restart a thermal power-plant which had been long out of use.
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